20tubes  heat pipe evacuated tube solar collectors 

Vacuum tube: three layer evacuated tube

The vacuum tube of our solar water heater has the high absorption rate and low emission rate,

the absorption rate is 0.91-0.93 (AM1.5)

the emission rate is 0.05-0.075 (80±5)

vacuum tightness is P<5.0*0.0001Pa

idle sunning property parameters is Y=220-260./KW

the average heat loss coefficient is Ult=0.6-0.7W(.)

1) This collector tube adopts magnetron sputtering coating technology

2)  Coating: Cu/Ss-Aln/Aln high efficient selective absorptive coating and vacuum heat insulation could get higher heat and have high performance of absorptance and low reflection ratio and performing a strong heating ability.

3)tube life: more than 15 years.

Our company is a manufacturer of  solar collectors and solar water heaters in China .We have ISO certification and some other related certifications.We always give our customers best price and good quality! We sincerely hope you will be my next business friends.